[Qt-creator] Error writing to program database with CDB and Qt Creator 1.2

[Robert Caldecott]

I am using Qt Creator 1.2/XP SP3/Qt 4.5.2 built with MSVC9 and when
building again after a CDB debugging session I am often getting the
following error:

:-1: error:  error writing to program database 'C:\..\foo.pdb'; check
for insufficient disk space, invalid path, or insufficient privilege

This happens perhaps 20% of the time and the only way to clear this is
to restart Qt Creator.  Attempting to delete the file in Windows
Explorer results in an 'Access is denied' error.